phone-side
/
uboot-mt623x
9
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

ARMV7: S5P: timer: get the count_value from register when call udelay 

Because of count_value is set to tcnb4 register,
should be get from this register when call udelay function.

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Minkyu Kang 2010-11-19 17:00:26 +09:00
parent 177feff303
commit d3b0d628b0
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/arm/cpu/armv7/s5p-common/timer.c
View File

@ -65,15 +65,12 @@ int timer_init(void)
writel((PRESCALER_1 & 0xff) << 8, &timer->tcfg0);
writel((MUX_DIV_2 & 0xf) << MUX4_DIV_SHIFT, &timer->tcfg1);
if (count_value == 0) {
/* reset initial value */
/* count_value = 2085937.5(HZ) (per 1 sec)*/
count_value = get_pwm_clk() / ((PRESCALER_1 + 1) *
(MUX_DIV_2 + 1));
/* count_value = 2085937.5(HZ) (per 1 sec)*/
count_value = get_pwm_clk() / ((PRESCALER_1 + 1) *
(MUX_DIV_2 + 1));
/* count_value / 100 = 20859.375(HZ) (per 10 msec) */
count_value = count_value / 100;
}
/* count_value / 100 = 20859.375(HZ) (per 10 msec) */
count_value = count_value / 100;
/* set count value */
writel(count_value, &timer->tcntb4);
@ -114,8 +111,11 @@ void set_timer(unsigned long t)
/* delay x useconds */
void __udelay(unsigned long usec)
{
struct s5p_timer *const timer = s5p_get_base_timer();
unsigned long tmo, tmp;
count_value = readl(&timer->tcntb4);
if (usec >= 1000) {
/*
* if "big" number, spread normalization